Many of our survey questions also come from published and validated surveys, particularly:
The Dog Personality Questionnaire (DPQ)
from Jones, A. C. Development and Validation of a Dog Personality Questionnaire. (University of Texas, 2008).
The Canine Health-related Quality of Life Survey (CHQLS)
from Lavan, R. P. Development and validation of a survey for quality of life assessment by owners of healthy dogs. Vet. J. 197, 578–582 (2013).
The Dog Impulsivity Assessment Scale (DIAS)
from Wright, H. F., Mills, D. S. & Pollux, P. M. J. Development and Validation of a Psychometric Tool forAssessing Impulsivity in the Domestic Dog (Canis familiaris). Int. J. Comp. Psychol. 24, (2011).
The Canine Cognitive Dysfunction Rating scale (CCDR)
from Salvin, H. E., McGreevy, P. D., Sachdev, P. S. & Valenzuela, M. J. The canine cognitive dysfunction rating scale (CCDR): a data-driven and ecologically relevant assessment tool. Vet. J. 188, 331–336 (2011).
The Certified Dog Trainer Exam (CDT)
from the International Association of Canine Professionals
The Dog Obesity Risk and Appetite questionnaire (DORA)
from Raffan, E., Smith, S. P., O’Rahilly, S. & Wardle, J. Development, factor structure and application of the Dog Obesity Risk and Appetite (DORA) questionnaire. PeerJ 3, e1278 (2015).
Hope this helps!